Air intake for internal-combustion engines



April' 5 1927. 1,623,721 7 Filed April 29. 1924 4 I 1/ 2/ .19 8 f Mmmmmm.M l6

INVENTOR EDWARD 6. F'LonEr.

M ATTORNEY Patented Apr. 5, 1927.

UNITED STATES PATENT OFFICE.

EDWARD C. FLOREY, F SAN JOSE, CALIFORNIA, ASSIGNOR OF ONE-HALF TO CHARLES E. STURGES, OF SAN JOSE, CALIFORNIA.

AIR INTAKE FQR INTERNAL-COMBUSTION ENGINES.

Application filed April 29, 1924. Serial No. 709,768.

My invention is an improved automatic air intake for internal combustion engines.

The object of my invention is to provide an air intake, in'which ports are'automatrcally opened for the admission of air, the opening of said ports depending upon the speed at which'the motor is rotating.

Another object is to provide an air intake which is simple in construction, inexpensive to manufacture and which may be readily attached to the'motor with a minimum amount of labor. I

In the annexed drawing in which my invention is illustrated:

Figure 1 is'a side vicwof my air intake mounted on a motor.

Figure 2 is afront elevation of my air intake.

Figure 3 is a plan view of the same.

Figure l is a sectional view taken on the line 4- of Figure3.

Figure 5 is a fragmentary sectional view taken on the line 55 of Figure 3.

Referring more particularly to the drawing, my air intake 1 is adapted to be mounted between the carburetor 2 and the mouth of the intake manifold 8. i The intake 1 consists of a plate 4, having'an opening 5 formed therein, which registers with the opening in the carburetor, and the intake manifold. Suitable slots 66 are provided inthe plate 4c through which bolts 7 extend to hold the carburetor upon the intake manifold, and the air intake 1 in position.

Two screens 8 and 9 are secured within the opening 5, the screen 8 being a fine mesh and the screen 9 having a coarse mesh. Conduits 10 and 11 are secured to the plate 4: and ports 12 and 13 extend through said plate from the conduits 10 and 11 respec tively, into the opening 5 and between the screens 8 and 9. Thus it will be seen that as air is admitted into the conduits 10 and 11 it will flow into the opening 5 and thence into the intake manifold of the engine.

A small port 16 is formed in the end of the conduit 10, and a large port 17 is formed in theend of the conduit 11. Balls '18 and 19 are set in the ports 16 and 17,

respectively. A weak spring bears against the ball 18 holding it in position in the port 16, said spring seating against the plate 4,. A relatively strong spring 21 bears against the ball 19 to hold it in position in the port 17, and also seats against the plate 4;.

The operation of my invention is as follows: At relatively slow speeds of the engine, but above idling speed, when the vacuum created thereby is relatively low, the weak spring 20 will permit the ball 18 to unseat from the port 16 and a small amount of air will pass through the small port 16 into the engine. As the speed of the engine increases the vacuum will increase which will depress the strong spring 21 and unseat the ball 19 permitting a large amount of air to pass through the port 17 into the engine. At idling speed both of the springs hold the balls in their seats and no auxiliary air enters the manifold Thus it will be seen that the proper amount of air is always admitted to the engine at all speeds thereof without the atten tion of the operator.

Having described my invention, I claim:

An air intake of the character described, comprising a flat plate adapted for insertion between the carburetor and the intake manifold of an internal combustion engine and formed with an opening registering with that of the intake manifold, flat screens sup ported in the opening in spaced relation and between the upper and lower planes of the plate, an embossment extending laterally from theplate having two ports extending therethrough connecting the space between the screens with the outer end thereof and a Y shaped element fitting against the embossment with the base thereof and having a port extending through each leg thereof,

the two ports being arranged for registry with the two ports in the embossment when the Y shaped element is placed against the embossment.

In testimony whereof I afix my signa- 

